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Salmonella enterica subsp. enterica serovar Anatum var. O 15+,34+ (Minneapolis) str. 82395

ABSTRACT: The Sequencing of Salmonella enterica strains.

PROVIDER: PRJNA168929 | ENA |

REPOSITORIES: ENA

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Genomic analysis of bacteriophage epsilon 34 of Salmonella enterica serovar Anatum (15+).

Project description:The presence of prophages has been an important variable in genetic exchange and divergence in most bacteria. This study reports the determination of the genomic sequence of Salmonella phage epsilon 34, a temperate bacteriophage that was important in the early study of prophages that modify their hosts' cell surface and is of a type (P22-like) that is common in Salmonella genomes.The sequence shows that epsilon 34 is a mosaically related member of the P22 branch of the lambdoid phages. Its sequence is compared with the known P22-like phages and several related but previously unanalyzed prophage sequences in reported bacterial genome sequences.These comparisons indicate that there has been little if any genetic exchange within the procapsid assembly gene cluster with P22-like E. coli/Shigella phages that are have orthologous but divergent genes in this region. Presumably this observation reflects the fact that virion assembly proteins interact intimately and divergent proteins can no longer interact. On the other hand, non-assembly genes in the "ant moron" appear to be in a state of rapid flux, and regulatory genes outside the assembly gene cluster have clearly enjoyed numerous and recent horizontal exchanges with phages outside the P22-like group. The present analysis also shows that epsilon 34 harbors a gtrABC gene cluster which should encode the enzymatic machinery to chemically modify the host O antigen polysaccharide, thus explaining its ability to alter its host's serotype. A comprehensive comparative analysis of the known phage gtrABC gene clusters shows that they are highly mobile, having been exchanged even between phage types, and that most "bacterial" gtrABC genes lie in prophages that vary from being largely intact to highly degraded. Clearly, temperate phages are very major contributors to the O-antigen serotype of their Salmonella hosts.

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Methylome of Salmonella enterica subsp. Enterica serovar Javiana str. CFSAN001992 by PacBio SMRT Sequencing

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Salmonella enterica subsp. enterica serovar Anatum var. O 15+,34+ (Minneapolis) str. 85487

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Methylome of Salmonella enterica subsp. Enterica serovar Javiana str. CFSAN001992 by PacBio SMRT Sequencing

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Salmonella enterica subsp. enterica serovar Anatum var. O 15+ (Newington) str. 91828

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Project description:Bifidobacterium thermophilum RBL67 (RBL67), a human fecal isolate and promising probiotic candidate, showed antagonistic and protective effects against Salmonella and Listeria in vitro. However, the underlying mechanisms fostering these health-related effects remain unknown. Therefor the transcriptome response of RBL67 and Salmonella enterica subsp. enterica serovar Typhimurium N-15 (N-15) in co-culture compared to the response in their respective mono-cultures. RNA was extracted from culture samples taken after 4 (N-15) or 5 h (RBL67) and RNAseq was performed on an Illumina HiSeq 2000 sequencer. Three biological replciates were performed resulting in 12 data sets: 3 RBL67 mono culture, 3 N15 mono-culture, 3 RBL67 co-culture, 3 N15 co-culture. Our study provided first insights into probiotic-pathogen interaction on transcriptional level and suggests a mechanism for how probiotic organisms can protect the host from infections.

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Expression analysis of Salmonella enterica serovar Typhimurium UK1 delta-iacP mutant

Project description:Investigation of whole genome gene expression level changes in a Salmonella enterica serovar Typhimurium UK1 delta-iacP mutant, compared to the wild-type strain. IacP is resoponsible for the secretion of virulence effector proteins via the type III secretion system, thereby contributing the virulence of S. Typhimurium. The mutants analyzed in this study are further described in Kim et al. 2011. Role of Salmonella Pathogenicity Island 1 Protein IacP in Salmonella enterica Serovar Typhimurium Pathogenesis. Infection and Immunity 79(4):1440-1450 (PMID 21263021).

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